Answer: One of the most common applications of computers in education today involves the ongoing use of educational software and programs that facilitate personalized online instruction for students. Programs like Ready use computers to assess students in reading and math.
Explanation:
Answer:
C, stealing someone else's personal data.
Answer:
#include //Line 1
namespace aaa //Line 2
{ const int X = 0; //Line 3
double y; //Line 4
}
using namespace std; //Line 5
int main() //Line 6
{ y = 34.50; //Line 7
cout << "X = " << X << ", y = " << y << endl; //Line 8
return 0; //Line 9
}
In Line 1, No header file is present,so it will print output as cout and endl is not defined.
we should include <iostream> header file in line 1
Lines 7 and 8 are incorrect.
X and y variables in aaa namespace are stated. So we can't use it any other namespace(std), but here y is initialized to 34.50 and x is printed in other namespace rather than stated.
Answer:
1.In the first query the column Z of table xyz wil change and set to its default value so we use alter command .
Syntax :ALTER TABLE TABLENAME ALTER COLUMN NAME SET DEFAULT VALUE
So SQL query is :
ALTER TABLE XYZ ALTER Z SET DEFAULT 9999 ;
This query will Change the column Z of a table XYZ to acceptdefault value 9999 .
2.In the second query we delete a table from database so we use DROP command .
Syntax :DROP TABLE TABLENAME;
So SQL query is :DROP TABLE XYZ;
This query will delete the table from database.
3.In the last query we have to change the column Z from table again we use alter command .
Syntax:ALTER TABLE TABLENAME DROP COLUMN COLUMNNAME ;
So SQL query is :
ALTER TABLE XYZ DROP COLUMN Z;
This query will delete column Z from the table XYZ.
